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1230 Uppsatser om Fuel consumption - Sida 11 av 82

Ungdomars kunskaper om dental erosion och deras konsumtionsvanor av sura drycker- en enkätstudie i åk 2 vid en gymnasieskolaAdolescents? knowledge of dental erosion and their consumption habits of soft drinks -a questionnaire study among secondary school

The aim of this study was to investigate the knowledge of dental erosion and the consumption habits of soft drinks among secondary school students. Differences between the sexes should also be investigated. The study consisted of 102 students, 60 women and 42 men, in the eleventh grade from a school in the south of Sweden. A questionnaire with 25 questions, divided in two parts with focus on knowledge respective consumption pattern and behaviour, was handed out and collected by the authors. The data showed that more than 50% of the participants had knowledge about dental erosion.

Yoga; spiritual balance of contemporary consumers

This research study constitutes a critical stand, which departure from the increase in welfare, and decrease in quality of life, and is further directed to the sphere of consumption. Contemporary consumers appear to seek for components to construct their self with through consumption, consumerism has become a sphere of life, and has consequently also become a victimizing force steering the identity and self construction of consumers. The alarm bells however are echoing in Western society, and consumers are experiencing dilemmas such as fragmentation, powerlessness, uncertainty and meaninglessness.In this respect we have presented spiritualism as an applicable path of escape or alternative to the scheme of the material oriented consumption sphere. We intend to broaden the scope of the interplay between spiritualism and consumerism in the act of yoga, and we have therefore been researching: what yoga is doing to consumers, and what consumers are doing to yoga. The study is based on an existential epistemology paradigm, which emphasis on the meaning of the yoga experience attained from the subjects of research; the yoga practitioners, and therefore we have carried out three focus group discussions.

Produktionsskillnader vid olika antal sortiment

This study is done together with Sydved AB in the summer of 2012. The purpose of the study is to analyse how different quantity of assortments influence the production for forwarders and harvesters with multiple tree handling aggregate in thinning, by different tree volumes. To make this analyse a time study was performed where three entrepreneurs work has been analysed. Beside the analyse, of different quantity of assortments, has also been analysed how the tree volume and a forest fuel assortment effect the production. The result of this study shows that the quantities of assortments have a significant meaning for the production. The biggest differences are most distinct between one and three assortments in the smaller tree volumes where production goes down if the quantity of assortments increase.

Beredskapsvattenförsörjningen på Sjukhuset i Varberg -En källa till problem?

The hospital in Varberg has a somewhat outmoded solution regarding the state of preparedness in its water sustentation. Today?s solution is both cause to a number of mishaps and high energy consumption.The report is initiated by looking into the present situation to get an insight to the problem.Today?s media depletion is measured and analyzed.Furthermore, it also looks into some earlier performed studies. These studies are followed up in order to see if measures have been taken.The report presents a number of arrangements which should be taken, amongst those a minor re-build of the current solution and a number of arrangements which leads to decreased water consumption..

?Vi kan bli ett Barbielag!? : En studie om yngre barns sociala relationer och identitetsskapande i ett postmodernt konsumtionssamhälle

One of the main goals in this study is to investigate how young children's identity formation and social relationships are depicted by today's consumer society.  In order to reach the goals of the study I also concentrated myself on questions regarding the reflection of symbolic aspects consumption in younger children's interaction and preschool-teachers' ideas about how and in what ways children's consumption patterns are created and developed nowadays. In order to answer the presented research questions I used the theoretical arguments of researchers in the field of pedagogy Gert Biesta in connection with the ideas and concepts of the consumer society characteristics developed by the sociologist Zygmunt Bauman.The thesis' methodological approach consists of a combination of semi-structured interviews with teachers and observations of children's interaction, which contributed to a systematic investigation of the thesis' problem area and served as a tool for obtaining answers to the research questions.The results demonstrate that consumption occupies a lot of space in young children's lives, which means that it greatly affects their social relationships today. Both consumption and knowledge of the known brands prove to be the child's path to the desired community on the one hand, and the children's way to the consumer world on the other (hand), which in turn points to an obvious dependence between children's consumption and their social relationships.The results also show that there is a tension between the perception of identity formation as preschool-policy-document on the one hand and the attitude of the identity prescribed by consumer society norms and regulations on the other..

CSR och politisk konsumtion : - en studie av Nikes och Pumas CSR- rapporter

?CSR and political consumption ? a study of Nike?s and Puma?s CSR-reports?The purpose of this dissertation is to examine if political consumption has influenced multinational corporations to improve their Corporate Social Responsibility reports and policies more, than a company who has not been a target for political consumption.This dissertation is a content analysis of Nike?s and Puma?s first (Nike 2001, Puma 2001) and latest (Nike 2007/09, Puma 2007/08) CSR- reports. Archie Carroll?s model of Corporate Social Responsibility is used as theoretical framework in this study. The model is used to focus on four areas within CSR; economic, legal, ethical and philanthropic.

Simulering av simulinkmodeller medExtended Kalman FilterTidsoptimering av integrering

Simulation of different systems can be done using a graphical model description of the system based on block diagrams. The simulation software Matlab/Simulink offers a lot of possibilities to describe a huge number of systems, which can be linear as well as nonlinear. The simulation using Matlab/Simulink is done by integration based on different kinds of numerical methods.When nonlinear Simulink-models are simulated, it is often interesting to apply a Kalman filter to handle the noise that may occur within the process as well as corrupting the measurement. However, application of such a filter leads to an extensive time-consumption despite using fast computers. The reason is that the existing Matlab functions are not constructed for time optimal evaluation.

Biomass losses during short-term storage of bark and recovered wood

Storage of biomass is associated with problems like heat development, biomasslosses, and reduction of the fuel quality. Certain processes such as biological- andchemical degradation are responsible for these storage problems. This master?sthesis was carried out at Vattenfall Research and Development AB and is alignedtowards quantifying the biomass losses from short-term storage (1-2 months) ofbark and recovered wood. The biomass was stored in outdoor piles during differentseasons, campaign 1 (summer) and campaign 2 (autumn).

Frysa livsmedelsrester eller kassera dem för biogasproduktion : En studie, ur livscykelperspektiv, av energianvändning och växthusgasutsläpp

Food is widely consumed and in 2011 an average American devoured approximately one ton of food. The production of these goods requires large amounts of energy and contributes to 22-31 % of all greenhouse gas emissions occurring in Europe. More than one third of the produced food is discarded instead of consumed, and food waste make up about 30 % of the waste generated by households. 60 % of this food waste could be avoided if the eatables were handled in a better way.Avoidable food waste arises partly because residues from food are not taken care of, and because the food is not stored in a way that optimise its durability. Residues arises part- ly because of the contradictory and complex demands of everyday life and are, because of our busy lifestyle, difficult to avoid.

Hållfasthetsegenskaper i gjutjärn : tensile properties of cast iron

In the last few years people have become more and more aware of how humanity is affecting the climate. In the direction of reducing the greenhouse gases is to design engines with higher tensile properties and reduced weight, in order to achieve lower Fuel consumption and cleaner fuel incineration in today's truck engines.In order to achieve these requirements it?s necessary to increase the combustion pressure in the engine. This requires higher tensile properties and high thermal conductivity of the engine material. The department of Component Technology at the University of Jönköping in collaboration with Volvo Powertrain AB, Scania CV AB and DAROS Piston Rings AB has been commissioned to develop this material and to find knowledge of material properties used in truck engines and piston rings used for marine applications.The purpose with this work is to analyze the tensile properties of a series of cast iron, cast under different metallurgical conditions.Four different series of cast irons have been analyzed from four points of view, carbon concentration, nodularity, amount inoculation and cooling rate.After the tensile test all specimen data was analyzed in a mathematic calculation program called Matlab 2006a.

APS - Akustiskt positioneringssystem

The objective of this work was to evaluate and implement a number of energy saving functions for a specific embedded system. The functions were then grouped into a number of energy levels with known properties in terms of functionality, energy consumption, and transition time between the levels.The embedded system consisted of an AT91 ARM9 processor, GSM/GPRS modem, display, Ethernet and other peripheral units. Some energy saving methods that were considered were suspend to RAM, suspend to disk, frequency scaling, and methods for saving energy in the modem, Ethernet, USB and display backlight. The functions were grouped into levels and an interface was specified for controlling the energy level.It proved possible to get known properties within the defined energy levels, even though the paritioning of functions into these levels proved to be sub-optimal in a typical application usage scenario because it was designed for mainly energy consumption, not usage.The final result is a number of energy saving functions grouped into levels, which are controllable via an application interface. Each of the levels have a known energy consumption in both loaded and un-loaded mode..

Kulturtanter : En studie i kvinnlig kulturkonsumtion

The aim of this study is, using the Swedish expression ?kulturtant? (cultured lady) as starting point, to understand how and why women consume the products of the culture industry more eagerly than men. The study is using the concepts put forward by Pierre Bourdieu; fields, capital and habitus. It is a qualitative study based on discussions in focus groups, interviews and material gathered through Google Alerts. In the literature this gap between the sexes with regard to the higher consumption on behalf of women has been referred to as the ?puzzle? of women´s cultural consumption.The empirical results show that the women in the study are well aware of what they want to gain by participating in cultural activities like reading, going to concerts, watching plays or going to the movies.

Ärtrev som substrat för biogasproduktion : En litteraturstudie och rötning i labbskala

Until 2020, 49% of Sweden's use of energy must derive from renewable sources. Greenhouse gases must as well decline with 40% compared to 1990 as a part of Sweden's 16 environmental objectives. Biogas is part of the effort to achieve these objectives, but as the demand for biogas increases, more substrates are needed to meet the demand. The purpose is to investigate the conditions for pea residue as substrate by performing lab-scale mesophilic digestion with different fractions and notch lengths and then to summarize pea residue as a substrate for biogas production. During anaerobic digestion, 1000 ml bottles were used as reactors for digestion.

Utveckling av försäljnings- och leveransmodell

The objective of this work was to evaluate and implement a number of energy saving functions for a specific embedded system. The functions were then grouped into a number of energy levels with known properties in terms of functionality, energy consumption, and transition time between the levels.The embedded system consisted of an AT91 ARM9 processor, GSM/GPRS modem, display, Ethernet and other peripheral units. Some energy saving methods that were considered were suspend to RAM, suspend to disk, frequency scaling, and methods for saving energy in the modem, Ethernet, USB and display backlight. The functions were grouped into levels and an interface was specified for controlling the energy level.It proved possible to get known properties within the defined energy levels, even though the paritioning of functions into these levels proved to be sub-optimal in a typical application usage scenario because it was designed for mainly energy consumption, not usage.The final result is a number of energy saving functions grouped into levels, which are controllable via an application interface. Each of the levels have a known energy consumption in both loaded and un-loaded mode..

Användning av rötrest från kombinerad etanol och biogasproduktion : en jämförelse mellan tre alternativ

Scandinavian Biogas is involved in the planning of a combined ethanol and biogas factory in Karlskoga, Sweden. Besides biogas and ethanol large amounts of digester residues will be produced, about 450 000 liquid tonnes residue (~7,3 % Dry Substance( DS)). The objective of this thesis was to investigate possible uses of the residue from the biogas production process ScandgasEthanol developed by Scandinavian Biogas, and to derive a methodological approach how to evaluate and compare handling systems. Three systems where proposed and compared in this thesis; spreading of the untreated residue as fertilizer (system 1), dewatering to a higher DS content to reduce transportation before spreading as fertilizer (system 2) and production of a solid fuel by dewatering and drying the residue (system 3). The general conditions for the proposed systems were investigated in terms of practical viability, economical aspects, environmental impact and energy inputs/outputs.

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